Pump



March 17, 1931 B. M. AVTREBES I 1,796,814

PUMP Original Filed May 24, 1 2 sheets-shut 1 m ve/rfor fire/n0 MA. Febes March 17, 1931. TREBES I 1,796,814

PUMP I Original Filed May 24, 1924 2 Sheets-Sheet 2 /n van/0r 15/4/00 MA. Febes Patented 17, 1931 UNITED STATES PATENT OFFICE BRUNO m ALFRED 'IBEBES, OF IBERWYN, ILLINOIS, ASSIGNOR TO WESTERN ELEG- TRIO mm, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK PUMP

Original application fled Kay 24, 1924, Serial No. 718,850. Divided and this application med Kay 10,

' 1828. Serial No. 276,644.

This invention relates to pumps and more particularly to a rotary (pump having lammated gears and is a lvision of my coppnding application, Serial No. 715,650, filed e principal object of this invention is to provlde an impioved gear pump in wh ch the output may varied wlthout a variation in speed.

In accordance with the general features of the invention there is provided a gear pump employing a pair of meshing gears, each of the gears comprisinga plurality of laminations and means being provided for selec- 15 tively engaging or disengaging the laminations with or from each other, a disengaged lamination being locked so as to vary the output of the pump without avarlation in its s eed. Ot er ob'ects and advantages of the invention wili become apparent from the fol lowing detailed description of one embodiment thereof, reference being had to the accompanying drawings, wherein,

Fig. 1 is a front elevation, partly in section, of a gear pump embodying the features of the invention shown in conjunction with an extrusion machine,

Fig. 2 is a horizontal sectional View of the pump taken on the line 22 of Fig. 1, and,

Fig. 3 is a vertical sectional view taken on the line 3-3 of Fig. 2.

Referring now to the drawings in which like reference numerals designate similar 35 parts throughout the several views, desig natesa frame which is of usual construction, Suitably mounted in the upper part of the frame 10 are a pair of steam heated kneading rolls 11-11 which may be revolved by any suitable means (not shown). Positioned above the rolls 11 is a hopper 13 into which plastic material to be extruded is fed. The plastic material, which may be rubber tta-percha or the like, is kneaded an o'rced by the rolls 11 into an intake chamber.14 leading to a gear ump denoted generally by the reference c aracter 15.

The gear, pump 15 comprises essentially a casing 18 and two gears 19 and 20 rotatably mounted therein on shafts 21 and 22,

respectively. Shaft 21 is adapted to be driven by any suitable source of power (not shown). The gear 19 is composed of three a bore 34 in which is located a rod 35 through which rod the pin 31 passes and to which it is secured. The rod 35 may be reciprocated in the bore by any suitable means such as a lever 36. Located to one side of the gear 19 are two toothed sectors 37 and 38 which are adapted to be brought into and out of enga em'ent with laminations 24 and 25, respectively, locking them against rotation. Levers 39 and, 40, ivotally mounted on a pin 41 (Figs. 2 and 3) suitably carried in an arm 43 extending from the casing 18, are pivotally secured to the sectors 37 and 38, res ectively, by pins 44 and 45, respectively.

he levers 39 and are adapted to reci rocate the sectors 37 and 38 into and out o engagement with laminations 24 and 25 respectively, the said sectors riding in a slot 46 formed in the casing 18.

It will be noted that only the laminations 24 and 25 of the gear 19 are ada ted to be locked against rotation the other amination 23 being constantly splined to the shaft 21. Upon the application of power to the shaft 21, laminat1on23 actuates lamination 26 of gear 20 and any other laminations of gear 19 which are keyed to the shaft 21 also function to actuate the associated laminations of gear 20 on shaft 22. Furthermore, by lockmg a lamination ofgear 19, the associated lamination of gear 20, meshing therewith, is also locked against rotation. It is readily apparent, therefore, that the smallest volume of material which may be forced through by the pump 15 is that amount which one pair of laminations is adapted to force therethrough, inasmuch as lamination 23 is always splined to the power driven shaft 21. By actuating either of the levers 39 or 40, toothed sectors 37 and 38 may be brought into engagement with laminations 2f]: or 25, respectively, which mesh with laminations 27 and 28, thereby enabling the locking of the said laminations against rotation.

By reciprocating the rod 35 through the medium of the lever 36, laminations 24 or 25 may be disengaged from the shaft 21. In order to exemplify this more clearly, the drawings disclose lamination 24 as being splined to the shaft 21 by keys 29 and 30, and lamination 25 disengaged from the shaft 21 and locked against rotation by the toothed sector 38.

The speed of this gear pump need not be varied in order to change or control the output of I the pump, this control being accomplished by selectively engaging or disengaging the laminations and thereafter locking the disengaged laminations which has already been fully described.

The gear pump herein disclosed is particularly advantageous in cases where plastic material is to be extruded as it enables the controlling and varying of the output of the mechanism in accordance with whatever rate of extrusion is desired, but it is to be understood that this gear pump may be used with many other machines and for many other purposes without departing from the spirit and scope of the invention as defined by the appended claims.

What is claimed is:

1. In a gear pump, a casing having an inlet and outlet, a gear positioned within the casing and comprising a plurality of laminations, and means for selectively driving the adjacent laminations to vary the output.

2. In a gear pump, a casing having an inlet and outlet, a gear positioned in said casing comprising a plurality of independent laminations adapted to engage each other, and means for selectively engaging and disengaging the laminations to vary the output.

3. In a gear pump, means for varying the output therefrom without changing the speed thereof comprising a plurality of adjacent rotary elements, and means for selectively controlling the rotation of the rotary elements to vary the output.

4:. In a gear pump, a plurality of sets of adjacent elements, and means for inter-connecting varying numbers of the elements of the respective sets in predetermined combinations for varying the output therefrom without changing the speed thereof.

5. In a gear pump, a gear comprising a plurality of toothed disks, and means for selectively engaging the adjacent toothed disks with each other to vary the output of the pump.

6. In a gear pump, a casing having an inlet and outlet, a gear positioned within the casing and comprisin a plurality of 1aminations, means for se ectively engaging or disengaging the laminations with or from each other to vary the capacity, and means for rotating the gear.

7. In a gear pump, a casing having an inlet and outlet, a gear positioned within the casing and comprising a plurality of laminations, means for selectively engaging or disengaging the laminations with or from each other, and means. for selectively look inlet and outlet, a pair of gears'in mesh with each other positioned within the casing, each of the gears comprising a plurality of laminations, and means for selectively engaging or disengaging the laminations with or from each other to vary the output of the pump.

10. In a gear pump, a casing having an inlet and outlet, a pair of gears in mesh with each other comprising a plurality of laminations and housed within the casing, means for selectively engaging or disengaging the laminations with or from each other to vary the output, and means for rotating the gears.

11. In a gear pump, a casing having an inlet and outlet, a pair of gears in mesh with each other comprising a plurality of laminations and housed within the casing, means for selectively engaging or disengaging the laminations with or from each other to vary the output, means for locking the disengaged laminations, and means for rotating the gears.

' 12. In a gear pump, a casing, a pair of gears rotatably mounted therein meshing with each other, the gears comprising a plurality of laminations, means for selectively engaging or disengagingthe laminations with or from each other to vary the capacity of the pump, means for locking the disengaged laminations, and means for rotating the gears.

13. In a gear pump, a casing, a pair of gears rotatably mounted in said casing and meshing with each other, said gears comprising a plurality of laminations, means for selectively engaging or disengaging the laminations with or from each other to vary the capacity of the pump, and tooth members adapted to be moved into registration with said laminations for locking the disengaged laminations.

14. In a' gear pump, a casing having an inlet and outlet and a passageway between 

